/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.aliyun.oss.connect.kafka.format.parquet;

import org.apache.avro.generic.GenericRecord;
import org.apache.hadoop.fs.Path;
import org.apache.parquet.avro.AvroParquetReader;
import org.apache.parquet.hadoop.ParquetReader;
import org.apache.parquet.proto.ProtoParquetReader;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

public class ParquetUtils {
  public static Collection<Object> getRecords(String bucketName, String fileKey, boolean isProto) throws IOException {
    List<Object> records = new ArrayList<>();
    Path file = new Path("oss://" + bucketName + "/" + fileKey);
    ParquetReader reader;
    if (isProto) {
      reader = ProtoParquetReader.builder(file).build();
    } else {
      reader = AvroParquetReader.<GenericRecord>builder(file).build();
    }
    Object record;
    do {
      record = reader.read();
      if (record == null) {
        break;
      }
      records.add(record);
    } while (true);
    return records;
  }
}
